syzbot


uvm_fault: NUM TID PID UID PRFLAGS PFLAGS CPU COMMAND*ADDR NUM NUM 0x2 ADDR 0K syz

Status: auto-obsoleted due to no activity on 2023/05/11 08:43
Reported-by: syzbot+9b2859fcf978d79e4b33@syzkaller.appspotmail.com
First crash: 412d, last: 412d

Sample crash report:
kernel: page fault trap, code=0
Stopped at      0    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*217999  87914      0         0x2  0x4000000    0K syz-fuzzer
0(0,0,0,ffff800021202da8,0,0) at 0
timeout_run(fffffd806857fdf0) at timeout_run+0xcc sys/kern/kern_timeout.c:641
softclock_process_kclock_timeout(fffffd806857fdf0,0) at softclock_process_kclock_timeout+0x1c6 sys/kern/kern_timeout.c:666
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:717
softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x25516bab0, count: 10
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: attempt to execute user address 0x0 in supervisor mode
ddb{0}> trace
0(0,0,0,ffff800021202da8,0,0) at 0
timeout_run(fffffd806857fdf0) at timeout_run+0xcc sys/kern/kern_timeout.c:641
softclock_process_kclock_timeout(fffffd806857fdf0,0) at softclock_process_kclock_timeout+0x1c6 sys/kern/kern_timeout.c:666
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:717
softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x25516bab0, count: -5
ddb{0}> show registers
rdi                                0
rsi                                0
rbp               0xffff800029df10c0
rbx                                0
rdx                                0
rcx               0xffffffff82b46ff0    cpu_info_full_primary+0x1ff0
rax                              0x9
r8                              0x83
r9                              0x83
r10               0xabbc4d84ba530535
r11                                0
r12                                0
r13               0xffffffff82b25a68    timeout_spinlock_obj
r14                                0
r15                                0
rip                                0
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff800029df1078
ss                                 0
0
ddb{0}> show proc
PROC (syz-fuzzer) pid=217999 stat=onproc
    flags process=2<EXEC> proc=4000000<THREAD>
    pri=53, usrpri=53, nice=20
    forw=0xffffffffffffffff, list=0xffff8000212435e8,0xffff800021228858
    process=0xffff80002122c870 user=0xffff800029dec000, vmspace=0xfffffd806f1318a0
    estcpu=3, cpticks=18, pctcpu=0.1
    user=1, sys=0, intr=1
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 48609  246058  16094      0  2           0                syz-executor.2
 38795   27043   8277      0  2           0                syz-executor.3
 38795  439880   8277      0  2   0x4000000                syz-executor.3
 38795  340671   8277      0  3   0x4000080  fsleep        syz-executor.3
 38795  368184   8277      0  2   0x4000000                syz-executor.3
 38795  235043   8277      0  2   0x4000000                syz-executor.3
 35892   22519  18988      0  2           0                syz-executor.6
 35892  443308  18988      0  3   0x4000080  fsleep        syz-executor.6
 41381  466891  63844      0  2           0                syz-executor.0
 41381  418306  63844      0  3   0x4000080  fsleep        syz-executor.0
 41381  226023  63844      0  3   0x4000080  fsleep        syz-executor.0
 41381  189790  63844      0  3   0x4000080  fsleep        syz-executor.0
 66660  265978   7514      0  2           0                syz-executor.7
 66660  110693   7514      0  3   0x4000080  fsleep        syz-executor.7
 44364  421808  40908      0  2           0                syz-executor.1
 44364  224886  40908      0  3   0x4000080  fsleep        syz-executor.1
 18988  385590  87914      0  3        0x82  nanoslp       syz-executor.6
 34464  168130      0      0  3     0x14280  nfsidl        nfsio
 68134  130907      0      0  3     0x14280  nfsidl        nfsio
  3107  109738      0      0  3     0x14280  nfsidl        nfsio
 19133  500402      0      0  3     0x14280  nfsidl        nfsio
 53076  321016      0      0  3     0x14280  nfsidl        nfsio
 20916   91821      0      0  3     0x14280  nfsidl        nfsio
 58922  341690      0      0  3     0x14280  nfsidl        nfsio
 25402   40609      0      0  3     0x14280  nfsidl        nfsio
 65113  186684      0      0  3     0x14280  nfsidl        nfsio
 18304  346087      0      0  3     0x14280  nfsidl        nfsio
 64449  379842      0      0  3     0x14280  nfsidl        nfsio
 26771  157089      0      0  3     0x14280  nfsidl        nfsio
 41502  157692      0      0  3     0x14280  nfsidl        nfsio
 25222  113244      0      0  3     0x14280  nfsidl        nfsio
 88143  396773      0      0  3     0x14280  nfsidl        nfsio
 45119  155613      0      0  3     0x14280  nfsidl        nfsio
 83799  163444      0      0  3     0x14280  nfsidl        nfsio
 81999  128019      0      0  3     0x14280  nfsidl        nfsio
 74713  514659      0      0  3     0x14280  nfsidl        nfsio
 15201  377893      0      0  3     0x14280  nfsidl        nfsio
  8277  138358  87914      0  2       0x482                syz-executor.3
 16094  131196  87914      0  2         0x2                syz-executor.2
 63844  143514  87914      0  3        0x82  nanoslp       syz-executor.0
 29448  380396      0      0  3     0x14200  acct          acct
 18623  263137  87914      0  2         0x2                syz-executor.4
 46868   67372      1      0  3    0x100083  ttyin         getty
 40908   54965  87914      0  3        0x82  nanoslp       syz-executor.1
  7514  446727  87914      0  2       0x482                syz-executor.7
 89064  390684      0      0  3     0x14200  bored         sosplice
 87914   95603  79589      0  3        0x82  thrsleep      syz-fuzzer
 87914  111827  79589      0  2   0x4000482                syz-fuzzer
 87914   23229  79589      0  3   0x4000082  wait          syz-fuzzer
 87914  263797  79589      0  3   0x4000082  thrsleep      syz-fuzzer
 87914  121617  79589      0  3   0x4000082  thrsleep      syz-fuzzer
 87914  259722  79589      0  3   0x4000082  wait          syz-fuzzer
 87914  190180  79589      0  3   0x4000082  wait          syz-fuzzer
 87914  149247  79589      0  3   0x4000082  thrsleep      syz-fuzzer
 87914  431755  79589      0  3   0x4000082  wait          syz-fuzzer
 87914  248429  79589      0  2   0x4000002                syz-fuzzer
 87914  335343  79589      0  3   0x4000082  thrsleep      syz-fuzzer
 87914  382911  79589      0  3   0x4000082  wait          syz-fuzzer
*87914  217999  79589      0  7   0x4000002                syz-fuzzer
 87914  107211  79589      0  3   0x4000082  wait          syz-fuzzer
 87914   57096  79589      0  3   0x4000082  wait          syz-fuzzer
 87914  396419  79589      0  3   0x4000082  thrsleep      syz-fuzzer
 79589  445776  81825      0  3    0x10008a  sigsusp       ksh
 81825  445777  99000      0  3        0x9a  kqread        sshd
 99000  111000      1      0  3        0x88  kqread        sshd
   487  480978  76372     74  3   0x1100092  bpf           pflogd
 76372   84828      1      0  3        0x80  netio         pflogd
 94485  138914  83295     73  3   0x1100090  kqread        syslogd
 83295  192193      1      0  3    0x100082  netio         syslogd
  4626  480052      1      0  3    0x100080  kqread        resolvd
 96115   44520   6300     77  3    0x100092  kqread        dhcpleased
   578   84826   6300     77  3    0x100092  kqread        dhcpleased
  6300  464447      1      0  3        0x80  kqread        dhcpleased
 32067   88015      0      0  3     0x14200  bored         smr
 62426  363077      0      0  2     0x14200                zerothread
 72813   51662      0      0  3     0x14200  aiodoned      aiodoned
 22122  323196      0      0  3     0x14200  syncer        update
 80573   88399      0      0  3     0x14200  cleaner       cleaner
 36258  271912      0      0  3     0x14200  reaper        reaper
 95086  436176      0      0  3     0x14200  pgdaemon      pagedaemon
 19093  153997      0      0  3     0x14200  bored         viomb
 15243  482403      0      0  3  0x40014200  acpi0         acpi0
 46494   36827      0      0  7  0x40014200                idle1
 39055  236293      0      0  3     0x14200  bored         softnet
 73507  348474      0      0  3     0x14200  bored         softnet
 73959  470734      0      0  3     0x14200  bored         softnet
 74338  233237      0      0  3     0x14200  bored         softnet
  4450  148216      0      0  3     0x14200  bored         systqmp
 85795  278319      0      0  3     0x14200  bored         systq
 79378  280833      0      0  3  0x40014200  bored         softclock
 50380  380692      0      0  3  0x40014200                idle0
     1   31554      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10248   6507K    7095K  78643K     30308        0
            pcb    13     18K      23K  78643K      1830        0
         rtable   204     17K      18K  78643K      2085        0
         ifaddr    79     26K      29K  78643K       903        0
         sysctl     2      0K       0K  78643K         4        0
       counters    58     35K      36K  78643K       798        0
       ioctlops     0      0K       4K  78643K      4074        0
            iov     0      0K      24K  78643K      2274        0
          mount     1      1K       1K  78643K         1        0
            log     0      0K       0K  78643K         4        0
         vnodes  1634    102K     103K  78643K     11730        0
      UFS quota     1     32K      32K  78643K         1        0
      UFS mount     5     36K      36K  78643K         5        0
            shm     2      1K       9K  78643K       103        0
         VM map     2      1K       1K  78643K         2        0
            sem    12      0K       0K  78643K      1771        0
        dirhash    12      2K       2K  78643K        12        0
           ACPI  1697    195K     286K  78643K     12548        0
      file desc    15     53K      81K  78643K      9947        0
          sigio     0      0K       0K  78643K       205        0
           proc    72     91K     115K  78643K      1839        0
        subproc    91      5K       6K  78643K       533        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
    ip_moptions     0      0K       0K  78643K       454        0
       in_multi    78      5K       6K  78643K       634        0
    ether_multi     1      0K       0K  78643K        35        0
            mrt     1      0K       0K  78643K        50        0
    ISOFS mount     1     32K      32K  78643K         1        0
  MSDOSFS mount     1     16K      16K  78643K         1        0
           ttys   247   1102K    1102K  78643K       247        0
           exec     0      0K       1K  78643K      2134        0
            tdb     3      0K       0K  78643K         3        0
        pagedep     1      8K       8K  78643K         1        0
       inodedep     1     32K      32K  78643K         1        0
         newblk     1      0K       0K  78643K         1        0
        VM swap     8     62K      64K  78643K        10        0
       UVM amap   388     90K     111K  78643K     66043        0
       UVM aobj   131      4K       4K  78643K       134        0
        memdesc     1      4K       4K  78643K         1        0
    crypto data     1      1K       1K  78643K         1        0
    ip6_options     0      0K       0K  78643K       536        0
            NDP    14      0K       0K  78643K       300        0
           temp   133   5778K    6802K  78643K     86837        0
         kqueue    12     18K      28K  78643K       770        0
      SYN cache     2     16K      16K  78643K         2        0
ddb{0}> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache    128       22    0        0     1     0     1     1     0     8    0
rtpcb      120      749    0      746    11    10     1     3     0     8    0
rtentry    112      612    0      529     4     0     4     4     0     8    0
unpcb      144     9635    0     9618   114   108     6    10     0     8    5
syncache   296       49    0       49    11    11     0     1     0     8    0
sackhl      24        1    0        1     1     1     0     1     0     8    0
tcpqe       32      255    0      255    10    10     0     1     0     8    0
tcpcb      776     3684    0     3678   117   116     1    14     0     8    0
arp        120       94    0       80     1     0     1     1     0     8    0
inpcb      368    20783    0    20773   253   244     9    24     0     8    7
nd6         48      133    0      112     1     0     1     1     0     8    0
pkpcb       40       32    0       32     7     6     1     1     0     8    1
kcovpl      48       41    0       34     1     0     1     1     0     8    0
mppekey    1024       5    0        5     3     3     0     1     0     8    0
ppxss      1256     253    0      253    22    22     0     1     0     8    0
pppxif     1456     141    0      141    11    11     0     1     0     8    0
pfstscr     40       15    0       15     3     3     0     1     0     8    0
pffrag     232       59    0       58     6     5     1     1     0   482    0
pffrnode    88       59    0       58     6     5     1     1     0     8    0
pffrent     40      236    0      235     6     5     1     1     0     8    0
pfosfp      40     1428    0     1005     5     0     5     5     0     8    0
pfosfpen   112     1428    0      714    21     0    21    21     0     8    0
pfanchor   1280     784   82      272    47     4    43    43     0     8    0
pfqueue    264        6    0        6     2     2     0     1     0     8    0
pfstitem    24       17    0       15     1     0     1     1     0     8    0
pfstkey    128       43    0       41     1     0     1     1     0     8    0
pfstate    384       31    0       29     2     1     1     2     0     8    0
pfrule     1344      21    0       20     2     1     1     2     0     8    0
rttmr      136        4    0        4     1     1     0     1     0     8    0
art_heap8  4096       2    0        1     2     0     2     2     0     8    1
art_heap4  256     2797    0     2444    48    22    26    29     0     8    3
art_table   32     2799    0     2445     4     0     4     4     0     8    0
art_node    16      608    0      537     1     0     1     1     0     8    0
semapl     112     1769    0     1759     1     0     1     1     0     8    0
shmpl      112      131    0        3     4     0     4     4     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256    14857    0    13390    93     0    93    93     0     8    0
ffsino     272    14857    0    13390    99     0    99    99     0     8    0
nchpl      144    28750    0    27111    63     0    63    63     0     8    0
rtmask      32       16    0       16     7     7     0     1     0     8    0
uvmvnodes   80     5926    0        0   121     0   121   121     0     8    0
vnodes     216     5926    0        0   330     0   330   330     0     8    0
namei      1024  111841    0   111841     6     5     1     2     0     8    1
percpumem   16      412    0      370     1     0     1     1     0     8    0
vmpool     696       11    0       11     3     3     0     1     0     8    0
kstatmem   264      408    0      380    11     8     3     3     0     8    0
scsiplug    72        6    0        6     2     2     0     1     0     8    0
scxspl     216    81918    0    81918    16    15     1     8     0     8    1
plimitpl   152     1391    0     1375     1     0     1     1     0     8    0
sigapl     424    10418    0    10351    11     3     8     8     0     8    0
futexpl     64   110871    0   110864     2     1     1     1     0     8    0
knotepl    120      811    0        0    15     1    14    14     0     8    0
kqueuepl   216     2211    0     2203    35    34     1     5     0     8    0
pipepl     320     2428    0     2403    69    63     6     8     0     8    3
fdescpl    496    10177    0    10149     5     1     4     5     0     8    0
filepl     152    89800    0    89575   155   140    15    23     0     8    4
lockfpl    104     2452    0     2450     4     3     1     2     0     8    0
lockfspl    48      828    0      826     1     0     1     1     0     8    0
sessionpl  144       61    0       45     1     0     1     1     0     8    0
pgrppl      48      266    0      250     1     0     1     1     0     8    0
ucredpl    104    13149    0    13130     1     0     1     1     0     8    0
zombiepl   144    10351    0    10351     1     0     1     1     0     8    1
processpl  1072   10418    0    10351     5     0     5     5     0     8    0
procpl     696    25992    0    25900    29    19    10    11     0     8    0
srpgc       96       48    0       48    12    11     1     1     0     8    1
sosppl     168       83    0       83    17    17     0     1     0     8    0
sockpl     488    31239    0    31209   715   703    12    42     0     8    7
mcl64k     65536      7    0        0     1     0     1     1     0     8    0
mcl16k     16384      4    0        0     1     0     1     1     0     8    0
mcl12k     12288      8    0        0     1     0     1     1     0     8    0
mcl9k      9216       2    0        0     1     0     1     1     0     8    0
mcl8k      8192       6    0        0     1     0     1     1     0     8    0
mcl4k      4096      10    0        0     2     0     2     2     0     8    0
mcl2k2     2112       3    0        0     1     0     1     1     0     8    0
mcl2k      2048     620    0        0    53    15    38    53     0     8    0
mtagpl      96      911    0        0    16     0    16    16     0     8    0
mbufpl     256     1591    0        0    85     0    85    85     0     8    0
bufpl      288    20011    0    13686   453     0   453   453     0     8    0
anonpl      24  1965882    0  1949338   243    61   182   193     0   186   43
amapchunkpl 152  191090    0   190312   105    52    53    62     0   158   19
amappl16   200    17887    0    17189   134    89    45    50     0     8    8
amappl15   192       78    0       73     1     0     1     1     0     8    0
amappl14   184      259    0      241     2     1     1     2     0     8    0
amappl13   176        5    0        5     1     1     0     1     0     8    0
amappl12   168      811    0      808     1     0     1     1     0     8    0
amappl11   160       50    0       36     1     0     1     1     0     8    0
amappl10   152       75    0       63     1     0     1     1     0     8    0
amappl9    144     1020    0     1018     1     0     1     1     0     8    0
amappl8    136      562    0      453     4     0     4     4     0     8    0
amappl7    128      246    0      218     2     0     2     2     0     8    0
amappl6    120      394    0      380     2     1     1     2     0     8    0
amappl5    112      387    0      378     1     0     1     1     0     8    0
amappl4    104     1006    0      971     2     0     2     2     0     8    0
amappl3     96    28885    0    28830     2     0     2     2     0     8    0
amappl2     88    11181    0    11100     4     2     2     4     0     8    0
amappl1     80   228529    0   227756    28    10    18    28     0     8    0
amappl      88    64949    0    64736     7     1     6     6     0    92    0
dma4096    4096       1    0        1     1     1     0     1     0     8    0
dma1024    1024       1    0        0     1     0     1     1     0     8    0
dma256     256        6    0        6     1     1     0     1     0     8    0
dma128     128      253    0      253     1     1     0     1     0     8    0
dma64       64        6    0        6     1     1     0     1     0     8    0
dma32       32        7    0        7     1     1     0     1     0     8    0
dma16       16       18    0       17     1     0     1     1     0     8    0
aobjpl      72      133    0        3     3     0     3     3     0     8    0
uaddrrnd    24    10188    0    10160     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24    10188    0    10160     1     0     1     1     0     8    0
vmmpekpl   168    79666    0    79604     4     0     4     4     0     8    0
vmmpepl    168   929451    0   926403   391   222   169   169     0   357   23
vmsppl     440    10187    0    10160     5     1     4     4     0     8    0
rwobjpl     56   241612    0   233597   136    20   116   118     0     8    1
pdppl      4096   20383    0    20320   599   532    67    77     0     8    4
pvpl        32  3839139    0  3816889   620   301   319   365     0   265   96
pmappl     248    10187    0    10160     3     1     2     3     0     8    0
extentpl    40       56    0       38     1     0     1     1     0     8    0
phpool     112     1727    0      845    26     0    26    26     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
0(0,0,0,ffff800021202da8,0,0) at 0
timeout_run(fffffd806857fdf0) at timeout_run+0xcc sys/kern/kern_timeout.c:641
softclock_process_kclock_timeout(fffffd806857fdf0,0) at softclock_process_kclock_timeout+0x1c6 sys/kern/kern_timeout.c:666
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:717
softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x25516bab0, count: -5
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x1a:        addq    $0x8,%rsp
x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020d68ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175
end trace frame: 0x0, count: 10
ddb{1}> trace
x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020d68ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175
end trace frame: 0x0, count: -5

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/02/10 08:42 openbsd c6749b327af2 07980f9d .config console log report ci-openbsd-multicore uvm_fault: NUM TID PID UID PRFLAGS PFLAGS CPU COMMAND*ADDR NUM NUM 0x2 ADDR 0K syz
* Struck through repros no longer work on HEAD.